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Commit 6941af28 authored by David Woodhouse's avatar David Woodhouse
Browse files

intel-iommu: Use iommu_should_identity_map() at startup time too.



At boot time, the dma_mask won't have been set on any devices, so we
assume that all devices will be 64-bit capable (and thus get a 1:1 map).

Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 73676832
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+14 −11
Original line number Diff line number Diff line
@@ -2117,6 +2117,17 @@ static int domain_add_dev_info(struct dmar_domain *domain,
	return 0;
}

static int iommu_should_identity_map(struct pci_dev *pdev, int startup)
{
	if (iommu_identity_mapping == 2)
		return IS_GFX_DEVICE(pdev);

	if (!startup)
		return pdev->dma_mask > DMA_BIT_MASK(32);

	return 1;
}

static int iommu_prepare_static_identity_mapping(void)
{
	struct pci_dev *pdev = NULL;
@@ -2127,7 +2138,7 @@ static int iommu_prepare_static_identity_mapping(void)
		return -EFAULT;

	for_each_pci_dev(pdev) {
		if (iommu_identity_mapping == 1 || IS_GFX_DEVICE(pdev)) {
		if (iommu_should_identity_map(pdev, 1)) {
			printk(KERN_INFO "IOMMU: identity mapping for device %s\n",
			       pci_name(pdev));

@@ -2448,14 +2459,6 @@ static int iommu_dummy(struct pci_dev *pdev)
	return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO;
}

static int iommu_should_identity_map(struct pci_dev *pdev)
{
	if (iommu_identity_mapping == 2)
		return IS_GFX_DEVICE(pdev);
	else
		return pdev->dma_mask > DMA_BIT_MASK(32);
}

/* Check if the pdev needs to go through non-identity map and unmap process.*/
static int iommu_no_mapping(struct device *dev)
{
@@ -2474,7 +2477,7 @@ static int iommu_no_mapping(struct device *dev)

	found = identity_mapping(pdev);
	if (found) {
		if (iommu_should_identity_map(pdev))
		if (iommu_should_identity_map(pdev, 0))
			return 1;
		else {
			/*
@@ -2491,7 +2494,7 @@ static int iommu_no_mapping(struct device *dev)
		 * In case of a detached 64 bit DMA device from vm, the device
		 * is put into si_domain for identity mapping.
		 */
		if (iommu_should_identity_map(pdev)) {
		if (iommu_should_identity_map(pdev, 0)) {
			int ret;
			ret = domain_add_dev_info(si_domain, pdev);
			if (ret)